Receiving 20 times more demand on opening day than any previous year, the Grand River Conservation Authority says more than 10,000 people waited in a virtual line up to book campsites this season.
Between 9 a.m. and 12 p.m. on Tuesday, there were about 3,000 individual campsite bookings, or 9,085 single-night reservations.
That number increased to 8,450 by noon on Wednesday, or 25,245 campsite nights taken.
While the GRCA says weekends, or long weekends in particular, are the busiest days for bookings at this time, there are still sites available.
The best chance of securing the desired campsite is to book on weekdays, or within the May to June, or September to October seasons.
As the COVID-19 pandemic continues, the GRCA has had to cut capacity in half, meaning it can only offer about 50 per cent of its inventory.
There was a brief service outage that occurred on Tuesday evening, the GRCA says, however, that was corrected quickly.